Having prophetic visions of people's deaths in no way except a lot of fanwanking could lead to anything that Psylocke can do. Let Psylocke be Psylocke whenever they get a chance to do her right, and let Yukio, who is by far the standout character of the film, be her own character without having to add something unneeded into her development. She was awesome in this and deserves to grow on her own.